PHP - eliminar archivo al cerrar pestaña o navegador ¿es posible?

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>

<script type="text/javascript">

var validNavigation = false;

function wireUpEvents() {

var dont_confirm_leave = 0; //set dont_confirm_leave to 1 when you want the    user to be able to leave withou confirmation

 var leave_message = 'ServerThemes.Net Recommend BEST WEB HOSTING at new tab  window. Good things will come to you'

 function goodbye(e) {

if (!validNavigation) {

window.open("http://serverthemes.net/best-web-hosting-services","_blank");

return leave_message;

}

}

window.onbeforeunload=goodbye;

// Attach the event keypress to exclude the F5 refresh

$(document).bind('keypress', function(e) {

if (e.keyCode == 116){

  validNavigation = true;

 }

 });

// Attach the event click for all links in the page

$("a").bind("click", function() {

validNavigation = true;

});

  // Attach the event submit for all forms in the page

 $("form").bind("submit", function() {

 validNavigation = true;

});

 // Attach the event click for all inputs in the page

  $("input[type=submit]").bind("click", function() {

 validNavigation = true;

 });

 }

  // Wire up the events as soon as the DOM tree is ready

   $(document).ready(function() {

   wireUpEvents();

   });

   </script>